Ian Cook created SPARK-48302:
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Summary: Null values in map columns of PyArrow tables are replaced
with empty lists
Key: SPARK-48302
URL: https://issues.apache.org/jira/browse/SPARK-48302
Project: Spark
Issue Type: Bug
Components: PySpark
Affects Versions: 4.0.0
Reporter: Ian Cook
Because of a limitation in PyArrow, when PyArrow Tables are passed to
spark.createDataFrame(), null values in MapArray columns are replaced with
empty lists.
The PySpark function where this happens is pyspark.sql.pandas.types.
_check_arrow_array_timestamps_localize.
Also see [https://github.com/apache/arrow/issues/41684].
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